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Chaps R
Courses Plus Student 2,003 PointsHow to detect a variable is boolean?
Hi,
Doing a little bit of browsing, one way in order to detect a variable is a boolean is using isinstance, thus here is my attempt on solving this quiz.
Can somebody point out why it doesn't remove the "False" variable inside the list ?
Thanks in advance!
messy_list = ["a", 2, 3, 1, False, [1, 2, 3]]
# Your code goes below here
messy_list.insert(0, messy_list.pop(3))
for entry in messy_list:
try:
entry+=1
except TypeError:
messy_list.remove(entry)
else:
if isinstance(entry, bool):
messy_list.remove(entry)
1 Answer
Steven Parker
229,644 PointsYou have two issues with this code.
First, you're using the list itself to control the iteration of the for loop, but at the same time you're depleting the contents of the list using remove. This will cause some of the elements to be skipped over. One way to resolve this is to make a copy of the list to control the loop using a slice: "for entry in messy_list[:]:"
Second, when you add 1 to the False value, implicit type conversion is applied and the result is an int with the value 1 with no error. Then, when isinstance tests the result, it is no longer bool.
Chaps R
Courses Plus Student 2,003 PointsChaps R
Courses Plus Student 2,003 PointsAh, thank you for pointing that out. appreciate it